diff --git a/README.md b/README.md
index 2ee1ba3877..c109435d7a 100644
--- a/README.md
+++ b/README.md
@@ -9,7 +9,7 @@
 This repository accompanies our research paper titled "[Generative Agents: Interactive Simulacra of Human Behavior](https://arxiv.org/abs/2304.03442)." It contains our core simulation module for  generative agents—computational agents that simulate believable human behaviors—and their game environment. Below, we document the steps for setting up the simulation environment on your local machine and for replaying the simulation as a demo animation.
 
 ## <img src="https://joonsungpark.s3.amazonaws.com:443/static/assets/characters/profile/Isabella_Rodriguez.png" alt="Generative Isabella">   Setting Up the Environment 
-To set up your environment, you will need to generate a `utils.py` file that contains your OpenAI API key and download the necessary packages.
+To set up your environment, you will need to generate a `utils.py` file that contains your OpenAI API key (which is paid) and download the necessary packages.
 
 ### Step 1. Generate Utils File
 In the `reverie/backend_server` folder (where `reverie.py` is located), create a new file titled `utils.py` and copy and paste the content below into the file: